Howe, Herbert A. (Herbert Alonzo), 1858-1926 · Meadville, Penna., Flood and Vincent · leaf 245
e on the opposite side ofthe celestial sphere from the sun, it is said to be atopposition. When the planet is beyond the sun andnearly in line with it, it is in conjunction. When Marsis at a favorable opposition it is more than fifty times as an°dJoppSon.bright as at conjunction, and rivals Jupiter… … The diameter of Mars is 4,200 miles. It consumes687 days, or nearly twenty-three months, in making onerevolution about the sun. Some of the markings on its surface are so welldenned and stablethat the time of ro-tation has beenfound very accu-rately by comparingdrawings made inthe seventeenth…
Astronomy
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